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17 Cards in this Set
- Front
- Back
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Strongyloides papillosis
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Ruminants
Adult worms are found in upper small intestine Disease occurs in young lambs, calves and goats; causes anorexia, emaciation, diarrhea and anemia |
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Strongyloides westeri
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Equine
Adults live in small intestine Heavy infections in young foals 2-3 months old; occurs most often in winter in damp, dirty surroundings Mares pass larvae in milk on days 4-44 of lactations Causes diarrhea in foals |
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Strongyloides ransomi
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Porcine
Transmammary transmission is very important in pigs Causes stunting, unthriftiness, anorexia, enteritis, diarrhea; can cause death in 2-3 week old pigs |
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Strongyloides stercoralis
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Dogs, cats, man and primates
Causes severe disease in puppies; bloody diarrhea with necrosis and sloughing of intestinal mucosa Frequently a kennel problem in hot humid weather (rhabditic dermatitis) |
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Strongylus vulgaris
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Equine
Large Strongyle Most pathogenic of the large strongyles Larvae cause severe damage to these vessels - cause aneurysms Repeated infections result in accumulated damage lead to colic |
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Strongylus edentatus
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Equine
Large Strongyle Disease: abdominal adhesion and peritonitis, fever and jaundice, depression, fibrous tags on liver, loss of appetite, colic; can be fatal |
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Strongylus equinus
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Equine
Large Strongyles Less common Can cause colic and anorexia during migration Adult horses may pass 30 million eggs per day |
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Cyathostomes
Triodontophorus sp. and Trichonema sp |
Equine
Small Strongyle May cause ulcers and hemorrhage; worms can be present in massive numbers |
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Oesophagostomum sp.
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Ruminants
Sheep Nodular worm Pimply Gut Seriously interfere with gut motility and digestion; nodules may rupture and cause peritonitis and abdominal adhesion Adult worms cause marked thickening of the bowel wall In lambs, see diarrhea, emaciation and death Cattle Similar to sheep |
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Oesophagostomum sp.
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Porcine
Similar to sheep and cattle; often seen in pigs kept on pasture Nodules form in the large intestine Cause thickening of the bowel wall, scarring, interferes with digestion, poor growth |
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Trichostrongylus axei
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Equine
Found in the stomach Causes irritation, ulceration, poor condition, etc. Often seen in horses pastured with ruminants |
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Trichostrongylus sp.
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Ruminants
Small hair worms or black scour worms Chew up intestinal mucosa, suck blood and produce toxins and antienzymes Life cycle is direct Adult worms attach to the mucosa and cause mild anemia, dark colored diarrhea due to blood, weight loss, weakness and emaciation |
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Nematodirus spp.
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Ruminants
May see no clinical signs, or may cause diarrhea, dehydration and emaciation Live in small intestine Increasingly being recognized as a significant problem |
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Haemonchus spp.
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Large stomach worms or barber-pole worms; females have a spiral stripe due to white uterus wrapping around the red alimentary tract
Found in abomasum - these are the most pathogenic of the stomach worms Suck blood, produce anticoagulant that increases blood loss; causes marked anemia, often fatal in young animals, especially sheep May die acutely or have chronic anemia, pale mucus mem-branes, listless, bottle-jaw, hard, dry feces Cattle, the presence of adult worms may inhibit the development of larvae; when treated, kills adults and allows massive simultaneous development of the arrested larvae |
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Ostertagia sp.
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Ostertagia circumcincta in sheep and goats
Ostertagia oster-tagia in cattle Most important in cattle Stomach worms; found in abomasum Type I Larve emerge immediately Larvae in the glands cause numerous raised white nodules in the abomasal mucosa affected animals have profuse diarrhea, rapid weight loss, Submandibular edema, anemia; may die Type II Larvae emerge following a period of arrested development |
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Trichostrongylus spp in Porcine
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Porcine
same as cattle and horses |
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Hyostrongylus rubidus
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Porcine
Small or red stomach worm; direct life cycle, eggs passed in feces; larvae ingested; develop in gastric glands Disease: ulceration of stomach lining, weakness, loss of condition, diarrhea Can have arrested (hypobiotic) stage, similar to Ostertagia |
